On Feb. 17, 2003, Jennifer Lynn Marcum parked her car at Denver International Airport and disappeared.

FBI agents suspect she was murdered, possibly by drug dealers, said Jennifer's father, Bob Marcum.

"Her body hasn't been found," Marcum said Saturday. "I really need to see something happen."

They are members of an organization called Families of Homicide Victims and Missing Persons, a Colorado-based group that stirs up interest among law enforcement agencies to solve their cold cases. There are more than 1,200 unsolved homicides or missing-person cases with Colorado connections, group officers say.